/*

 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package sun.java2d.pipe;

import java.awt.font.FontRenderContext;

import java.awt.font.GlyphVector;

import java.awt.font.TextLayout;

import sun.java2d.SunGraphics2D;

import sun.font.GlyphList;

import sun.awt.SunHints;

import java.awt.Shape;

import java.awt.geom.AffineTransform;

import java.awt.font.TextLayout;

/**

 * A delegate pipe of SG2D for drawing "large" text with

 * a solid source colour to an opaque destination.

 * The text is drawn as a filled outline.

 * Since the developer is not explicitly requesting this way of

 * rendering, this should not be used if the current paint is not

 * a solid colour.

 *

 * If text anti-aliasing is requested by the application, and

 * filling path, an anti-aliasing fill pipe needs to

 * be invoked.

 * This involves making some of the same decisions as in the

 * validatePipe call, which may be in a SurfaceData subclass, so

 * its awkward to always ensure that the correct pipe is used.

 * The easiest thing, rather than reproducing much of that logic

 * is to call validatePipe() which works but is expensive, although

 * probably not compared to the cost of filling the path.

 * Note if AA hint is ON but text-AA hint is OFF this logic will

 * produce AA text which perhaps isn't what the user expected.

 * Note that the glyphvector obeys its FRC, not the G2D.

 */

public class OutlineTextRenderer implements TextPipe {

    // Text with a height greater than the threshhold will be

    // drawn via this pipe.

    public static final int THRESHHOLD = 100;

    public void drawChars(SunGraphics2D g2d,

                          char data[], int offset, int length,

                          int x, int y) {

        String s = new String(data, offset, length);

        drawString(g2d, s, x, y);

    }

    public void drawString(SunGraphics2D g2d, String str, double x, double y) {

        if ("".equals(str)) {

            return; // TextLayout constructor throws IAE on "".

        }

        TextLayout tl = new TextLayout(str, g2d.getFont(),

                                       g2d.getFontRenderContext());

        Shape s = tl.getOutline(AffineTransform.getTranslateInstance(x, y));

        int textAAHint = g2d.getFontInfo().aaHint;

        int prevaaHint = - 1;

        if (textAAHint != SunHints.INTVAL_TEXT_ANTIALIAS_OFF &&

            g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) {

            prevaaHint = g2d.antialiasHint;

            g2d.antialiasHint =  SunHints.INTVAL_ANTIALIAS_ON;

            g2d.validatePipe();

        } else if (textAAHint == SunHints.INTVAL_TEXT_ANTIALIAS_OFF

            && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_OFF) {

            prevaaHint = g2d.antialiasHint;

            g2d.antialiasHint =  SunHints.INTVAL_ANTIALIAS_OFF;

            g2d.validatePipe();

        }

        g2d.fill(s);

        if (prevaaHint != -1) {

             g2d.antialiasHint = prevaaHint;

             g2d.validatePipe();

        }

    }

    public void drawGlyphVector(SunGraphics2D g2d, GlyphVector gv,

                                float x, float y) {

        Shape s = gv.getOutline(x, y);

        int prevaaHint = - 1;

        FontRenderContext frc = gv.getFontRenderContext();

        boolean aa = frc.isAntiAliased();

        /* aa will be true if any AA mode has been specified.

         * ie for LCD and 'gasp' modes too.

         * We will check if 'gasp' has resolved AA to be "OFF", and

         * in all other cases (ie AA ON and all LCD modes) use AA outlines.

         */

        if (aa) {

            if (g2d.getGVFontInfo(gv.getFont(), frc).aaHint ==

                SunHints.INTVAL_TEXT_ANTIALIAS_OFF) {

                aa = false;

            }

        }

        if (aa && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) {

            prevaaHint = g2d.antialiasHint;

            g2d.antialiasHint =  SunHints.INTVAL_ANTIALIAS_ON;

            g2d.validatePipe();

        } else if (!aa && g2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_OFF) {

            prevaaHint = g2d.antialiasHint;

            g2d.antialiasHint =  SunHints.INTVAL_ANTIALIAS_OFF;

            g2d.validatePipe();

        }

        g2d.fill(s);

        if (prevaaHint != -1) {

             g2d.antialiasHint = prevaaHint;

             g2d.validatePipe();

        }

    }

}